linux-kernel - Re: [PATCH 5/5] i2c: stm32: remove unnecessary CONFIG_PM

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Date:   Thu, 29 Oct 2020 12:31:54 +0100
From:   Fabrice Gasnier <fabrice.gasnier@...com>
To:     Coiby Xu <coiby.xu@...il.com>, <linux-i2c@...r.kernel.org>
CC:     Alexandre Torgue <alexandre.torgue@...com>,
        open list <linux-kernel@...r.kernel.org>,
        Pierre-Yves MORDRET <pierre-yves.mordret@...com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        "moderated list:ARM/STM32 ARCHITECTURE" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "moderated list:ARM/STM32 ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        Alain VOLMAT <alain.volmat@...com>
Subject: Re: [PATCH 5/5] i2c: stm32: remove unnecessary CONFIG_PM_SLEEP

On 10/29/20 8:46 AM, Coiby Xu wrote:
> SET_SYSTEM_SLEEP_PM_OPS has already took good care of CONFIG_PM_CONFIG.
> 
> Signed-off-by: Coiby Xu <coiby.xu@...il.com>
> ---
>  drivers/i2c/busses/i2c-stm32f7.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
> index f41f51a176a1..95ac9dfdf458 100644
> --- a/drivers/i2c/busses/i2c-stm32f7.c
> +++ b/drivers/i2c/busses/i2c-stm32f7.c
> @@ -2262,7 +2262,6 @@ static int __maybe_unused stm32f7_i2c_runtime_resume(struct device *dev)
>  	return 0;
>  }
>  
> -#ifdef CONFIG_PM_SLEEP

Hi Coiby,

This generates warnings when building with W=1 and CONFIG_PM_SLEEP=n.
Could you please add also "__maybe_unused" for relevant routines below ?

>  static int stm32f7_i2c_regs_backup(struct stm32f7_i2c_dev *i2c_dev)
             ^
e.g. insert: __maybe_unused

Best regards,
Fabrice
>  {
>  	int ret;
> @@ -2356,7 +2355,6 @@ static int stm32f7_i2c_resume(struct device *dev)
>  
>  	return 0;
>  }
> -#endif
>  
>  static const struct dev_pm_ops stm32f7_i2c_pm_ops = {
>  	SET_RUNTIME_PM_OPS(stm32f7_i2c_runtime_suspend,
>